The seventh time was the lucky one for the Denver Community Schools in northeast Iowa last night (Tuesday). A two-point-one million dollar school bond issue to build a middle school addition was approved by voters, by a 62-to-38 percent margin. After six previous attempts, superintendent Bob Conway is relieved this one passed.Denver School Board president Carter Stevens says the prospect of getting 800-thousand dollars in Vision Iowa money for the project really helped get the referendum passed. He says that seemed to be the thing that turned voters in favor of the project.